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  • 1
    Electronic Resource
    Electronic Resource
    The positive effect of hydrogen on the reaction of nitric oxide with carbon monoxide over platinum and rhodium catalysts (1995)
    Springer
    Catalysis letters 32 (1995), S. 357-369 
    Details
    ISSN: 1572-879X
    Keywords: nitric oxide ; carbon monoxide ; hydrogen ; Pt/Al2O3 ; Rh/Al2O3
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The effect of adding 330–4930 ppm hydrogen to a reaction mixture of NO and CO (2000 ppm each) over platinum and rhodium catalysts has been investigated at temperatures around 200–250°C. Hydrogen causes large increases in the conversion of NO and, surprisingly, also of CO. Oxygen atoms from the additional NO converted are eventually combined with CO to give CO2 rather than react with hydrogen to form water. This reaction is described by CO + NO +3/2H2 → CO2 + NH3 and accounts for 50–100% of the CO2 formed with Pt/Al2O3 and 20–50% with Rh/Al2O3. With the latter catalyst a substantial amount of NO converted produces nitrous oxide. Comparison with a known study of unsupported noble metals suggests that isocyanic acid (HNCO) might be an important intermediate in a reaction system with NO, CO and H2 present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00813230
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stable carbon dioxide reforming of methane over modified Ni/Al2O3 catalysts (1998)
    Springer
    Catalysis letters 52 (1998), S. 43-47 
    Details
    ISSN: 1572-879X
    Keywords: coke deposition ; Ni/Al2O3 catalysts ; carbon dioxide reforming ; Mn-modified Ni/Al2O3 catalyst
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract CO2 reforming of methane was studied over modified Ni/Al2O3 catalysts. The metal modifiers were Co, Cu, Zr, Mn, Mo, Ti, Ag and Sn. Relative to unmodified Ni/Al2O3, catalysts modified with Co, Cu and Zr showed slightly improved activity, while other promoters reduced the activity of CO2 reforming. Mn-promoted catalyst showed a remarkable reduction in coke deposition, while entailing only a small reduction in catalytic activity compared to unmodified catalyst. The catalysts prepared at high calcination temperatures showed higher activity than those prepared at low calcination temperature. The Mn-promoted catalyst showed very low coke deposition even in the absence of diluent gas and the activity changed only slightly during 100 h operation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1019002932509
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    New technology for hydrogen production by the catalytic oxidation and steam reforming of methanol at low temperaturesDedicated to Professor Dr. Manfred Baerns on the occasion of his 60th birthday (1995)
    Weinheim : Wiley-Blackwell
    Chemical Engineering & Technology - CET 18 (1995), S. 1-6 
    Details
    ISSN: 0930-7516
    Keywords: Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A simple design of an adiabatic reactor for the production of hydrogen from methanol without external heating has been explored. Heat and steam are generated by oxidising part of the methanol and are removed in the process of reforming methanol to hydrogen. The reactor design emphasises the degree of control that can be achieved in a two-bed system by controlling the air to methanol and water to methanol ratios in the feed. Predictions of the model are compared with experimental testing to allow optimisation of the process. Up to 75% of methanol can be converted to hydrogen.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ceat.270180102
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Gasification of carbonaceous particulates (1998)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 71 (1998), S. 57-60 
    Details
    ISSN: 0268-2575
    Keywords: diesel soot ; carbon gasification ; NOx ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The reactions of soot particulates and carbons with three oxidising agents expected in the exhaust gases from a diesel engine have been studied. Nitrogen dioxide has been found to be an efficient gasifying agent for carbons, carbon oxides and nitric oxide being produced. The reaction with diesel particulates commences above c. 150°C: with graphite, gasification became significant only above c. 550°C. The presence of oil on the particulates does not affect gasification. © 1998 SCI.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 5
    Electronic Resource
    Electronic Resource
    Adsorption-Reaction Processes for the Removal of Hydrogen Sulphide from Gas Streams (1997)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 68 (1997), S. 411-416 
    Details
    ISSN: 0268-2575
    Keywords: hydrogen sulphide ; adsorption ; oxidation ; carbon ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The use of porous materials for the removal of traces of hydrogen sulphide from gas streams was investigated in this study. It was found that microporous carbons had the highest removal efficiency. This was due to the fact that carbons have extra potential for the oxidation of hydrogen sulphide while other sorbents remove the gas only by adsorption. The oxidative removal efficiency of microporous carbons was found to be a function of water vapour pressure, oxygen concentration and temperature. The mechanism of the reaction is discussed. © 1997 SCI.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 6
    Electronic Resource
    Electronic Resource
    Structural effects in oxidative dehydrogenation of hydrocarbons over a vanadia-molybdena-niobia catalyst (1998)
    Chichester : Wiley-Blackwell
    Journal of Chemical Technology AND Biotechnology 72 (1998), S. 19-22 
    Details
    ISSN: 0268-2575
    Keywords: oxidative dehydrogenation ; catalyst ; vanadia ; molybdena ; niobia ; ethane ; propane ; n-butane ; isobutane ; isopropylbenzene ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The oxidative dehydrogenation of ethane, propane and n-butane over a vanadia-molybdena-niobia catalyst has been compared with propane substituted in the 2 position with a methyl (isobutane) or a benzyl (isopropylbenzene) group. In the normal paraffins, selectivity to the olefin was found to decrease as the chain length increased. Substitution at the propane 2 position increased selectivity, particularly in the case of isopropylbenzene. The results are explained partially in terms of over oxidation of the product olefin and partially in terms of structural effects in the parent hydrocarbon influencing the olefin-producing oxidative dehydrogenation reaction. © 1998 SCI
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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